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#!/bin/bash
# scripts/common makes use of variables defined in the ImageBuilder
# config file as described in README.md, including but not limited to
# the following:
#
# - UBOOT_SOURCE
# - UBOOT_SCRIPT
# - NUM_DOMUS
# - DOMU_PASSTHROUGH_PATHS
# - DOMU_PASSTHROUGH_DTB
# - LOPPER_PATH
# - LOPPER_CMD
# - DEVICE_TREE
tmp_files=()
tmp_dirs=()
# Highest valid phandle. Will be decremented with each call to get_next_phandle
phandle_next="0xfffffffe"
function remove_tmp_files()
{
for i in "${tmp_files[@]}"
do
rm -r "$i"
done
for i in "${tmp_dirs[@]}"
do
rm -rf "$i"
done
}
# Get next phandle and set it as a value (in hex) of a variable whose name is
# passed as a first argument. Decrement global counter phandle_next.
function get_next_phandle()
{
eval "$1=$(printf "0x%x" $phandle_next)"
phandle_next=$(( $phandle_next - 1 ))
}
function sanity_check_partial_dts()
{
local domU_passthrough_path="$1"
local partial_dts_dir="$2"
local address_cells_val
local size_cells_val
local tmpdtb
local val
local file
for devpath in $domU_passthrough_path
do
file=${devpath##*/}
file="$partial_dts_dir"/"$file".dts
if ! test -f "$file"
then
echo "Device tree \"$file\" is not present"
return 1
fi
tmpdtb=`mktemp`
dtc -I dts -O dtb -o $tmpdtb "$file"
tmp_files+=($tmpdtb)
val=$(fdtget $tmpdtb /passthrough \#address-cells)
if test -z "$address_cells_val"
then
address_cells_val="$val"
else
if test "$address_cells_val" -ne "$val"
then
echo "Address cells mismatch for ${DOMU_PASSTHROUGH_PATHS[$i]}"
return 1
fi
fi
val=$(fdtget $tmpdtb /passthrough \#size-cells)
if test -z "$size_cells_val"
then
size_cells_val="$val"
else
if test "$size_cells_val" -ne "$val"
then
echo "Size cells mismatch for ${DOMU_PASSTHROUGH_PATHS[$i]}"
return 1
fi
fi
done
return 0
}
function compile_merge_partial_dts()
{
local dtb_dir=$1
local repo=$(echo "$2" | awk '{print $1}')
local dir=$(echo "$2" | awk '{print $2}')
local partial_dts_dir
local tmp
local tmpdts
local file
local node
local i
local j
if test "$repo"
then
# Partial dts will be obtained from PASSTHROUGH_DTS_REPO
if [[ "$repo" =~ .*@.*:.* ]]
then
tmp=`mktemp -d`
tmp_dirs+=($tmp)
echo "Cloning git repo \"$git_repo\""
git clone "$repo" $tmp
if test $? -ne 0
then
echo "Error occurred while cloning \"$git_repo\""
return 1
fi
repo=$tmp
fi
if test -z "$dir"
then
dir="."
fi
partial_dts_dir="$repo"/"$dir"
else
# Partial dts will be generated by the lopper
tmp=`mktemp -d`
tmp_dirs+=($tmp)
partial_dts_dir="$tmp"
fi
i=0
while test $i -lt $NUM_DOMUS
do
if test -z "${DOMU_PASSTHROUGH_PATHS[$i]}"
then
echo "DOMU_PASSTHROUGH_PATHS[$i] is not defined"
return 1
fi
if test -z "$repo"
then
# Generate partial dts using lopper
for devpath in ${DOMU_PASSTHROUGH_PATHS[$i]}
do
node=${devpath##*/}
file="$partial_dts_dir"/"$node".dts
# Execute lopper with the following assists:
# - extract: used to take the target node, extract it from the
# system device tree, chase the phandle references and place
# it in a new extracted tree structure,
# - extract-xen: used to perform Xen specific modifications
# on the extracted tree structure e.g. adding "xen,path",
# "xen,reg", interrupt-parent properties.
# For additional information, please see the lopper's README
# file as well as usage of the mentioned assists.
$LOPPER_PATH --permissive -f $DEVICE_TREE \
-- extract -t $devpath $LOPPER_CMD \
-- extract-xen -t $node -o $file
if test $? -ne 0
then
return 1
fi
done
fi
sanity_check_partial_dts "${DOMU_PASSTHROUGH_PATHS[$i]}" "$partial_dts_dir"
if test $? -ne 0
then
return 1
fi
tmp=`mktemp "$dtb_dir/partial-dts-domU$i-XXX"`
tmp_files+=($tmp)
j=1
for devpath in ${DOMU_PASSTHROUGH_PATHS[$i]}
do
node=${devpath##*/}
file="$partial_dts_dir"/"$node".dts
# All the subsequent dts files should not have dts version mentioned
if test $j -gt 1
then
tmpdts=`mktemp`
cp "$file" "$tmpdts"
tmp_files+=($tmpdts)
file="$tmpdts"
sed -i '/\/dts-v/d' "$file"
fi
echo "/include/ \"$file\"" >> "$tmp"
j=$(( $j + 1 ))
done
dtc -I dts -O dtb -o "$tmp".dtb "$tmp"
if test $? -ne 0
then
echo "Could not compile \"$tmp\""
return 1
fi
if test "${DOMU_PASSTHROUGH_DTB[$i]}"
then
echo "Can't set both PASSTHROUGH_DTS_REPO and DOMU_PASSTHROUGH_DTB"
return 1
fi
DOMU_PASSTHROUGH_DTB[$i]="$tmp".dtb
i=$(( $i + 1 ))
done
return 0
}
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